X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;ds=sidebyside;f=source%2Fgeometry%2Ftransformedshape.h;h=9387123508dcf081341c076f8c4e41970a10ead0;hb=2826730b5d68d1ad74dc6363af43ca796f96caa2;hp=002f3c1a1cc859485decd5830f940137f33fda16;hpb=44bd1d1ab256d397be4e2169c4ca5efdd0569d31;p=libs%2Fmath.git

diff --git a/source/geometry/transformedshape.h b/source/geometry/transformedshape.h
index 002f3c1..9387123 100644
--- a/source/geometry/transformedshape.h
+++ b/source/geometry/transformedshape.h
@@ -109,7 +109,30 @@ inline unsigned TransformedShape<T, D>::get_intersections(const Ray<T, D> &ray,
 template<typename T, unsigned D>
 inline Coverage TransformedShape<T, D>::get_coverage(const BoundingBox<T, D> &bbox) const
 {
-	return shape->get_coverage(inverse_trans.transform(bbox));
+	BoundingBox<T, D> local_bbox = inverse_trans.transform(bbox);
+	Coverage coverage = shape->get_coverage(local_bbox);
+	if(coverage==PARTIAL_COVERAGE)
+	{
+		BoundingBox<T, D> outer_bbox = transformation.transform(local_bbox);
+		LinAl::Vector<T, D> min_pt = local_bbox.get_minimum_point();
+		LinAl::Vector<T, D> max_pt = local_bbox.get_maximum_point();
+		for(unsigned i=0; i<D; ++i)
+		{
+			T scale_ratio = (1-bbox.get_dimension(i)/outer_bbox.get_dimension(i))*local_bbox.get_dimension(i);
+			T low_gap = bbox.get_minimum_coordinate(i)-outer_bbox.get_minimum_coordinate(i);
+			T high_gap = outer_bbox.get_maximum_coordinate(i)-bbox.get_maximum_coordinate(i);
+			min_pt[i] += low_gap*scale_ratio;
+			max_pt[i] -= high_gap-scale_ratio;
+		}
+
+		local_bbox = BoundingBox<T, D>(min_pt, max_pt);
+		if(shape->get_coverage(local_bbox)>=PARTIAL_COVERAGE)
+			return PARTIAL_COVERAGE;
+		else
+			return UNCERTAIN_COVERAGE;
+	}
+	else
+		return coverage;
 }
 
 } // namespace Geometry